from datetime import date, timedelta

happy_day_count = 0

td = timedelta(days=1)
d = date(2015, 1, 1)

while d.year == 2015:
    digit1 = d.day % 10 # 1の位
    digit2 = int((d.day/10) % 10) # 10の位
    if d.month == digit2 + digit1:
        happy_day_count += 1
    # 翌日に進める
    d = d + td

print(happy_day_count)